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ZTE Communications ›› 2017, Vol. 15 ›› Issue (1): 61-66.doi: 10.3969/j. issn.1673-5188.2017.01.010

• Research Paper • Previous Articles    

Nonbinary LDPC BICM for Next-Generation High-Speed Optical Transmission Systems

LIN Changyu1, Ivan B. Djordjevic1, WANG Weiming2, CAI Yi3   

  1. 1.Department of Electrical and Computer Engineering, University of Arizona, Tucson, AZ 85721, USA
    2.ZTE Inc., 6 Huashiyuan Rd, Donghu H.D.Z., Wuhan 430223, China
    3.ZTE (TX) Inc., 55 Madison Ave., Morristown, NJ 07960, USA
  • Received:2016-12-31 Online:2017-02-25 Published:2019-12-24
  • About author:LIN Changyu (lcy@email.arizona.edu) received his Ph.D. from University of Arizona, USA. He is a senior optical engineer with Infinera Corporation. His research interests include OFDM system, MIMO signal processing, fiber nonlinearity, coded-modulation and quantum information.|Ivan B. Djordjevic (ivan@email.arizona.edu) is a tenured associate professor in the Department of Electrical and Computer Engineering, College of Engineering, University of Arizona, USA, with a joint appointment in the College of Optical Sciences. Prior to joining University of Arizona, he was with University of the West of England and University of Bristol, UK; Tyco Telecommunications, Eatontown, USA. His current research interests include optical communications/networks, error control coding, coded modulation, turbo equalization, OFDM applications, quantum information processing and quantum biology.|WANG Weiming (wang.weiming6@zte.com.cn) received his master’s degree from Huazhong University of Technology. He is a senior algorithm/FPGA engineer with ZTE Corporation, China. His research interests include digital signal processing, error control coding and coded-modulation.|CAI Yi (Anthony.tsai@ztetx.com) received the Ph.D. degree in electrical engineering from the University of Maryland Baltimore County, USA, in 2001. Dr. Cai is a director of DSP with ZTE Optics Labs, USA. Prior to joining ZTE Corporation, he worked with Tyco Electronics Subsea Communications as an outstanding researcher. His research focuses on the application of coherent detection, forward error correction, and advanced modulation formats in optical fiber communications.

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Abstract:

We propose a nonbinary byte-interleaved coded-modulation scheme with inner and outer turbo-like iterative decoder. The net coding gain is 0.6 dB higher than the state-of-the-art binary single parity check (SPC) low-density parity-check (LDPC) based turbo-product counterpart, with adjustable iterations and lower error-floor. We provide the details of Bahl-Cocke-Jelinek-Raviv (BCJR) based inner code decoder and optimum signal constellation design (OSCD) method in this paper. The single-mode fiber (SMF) channel simulation is also discussed.

Key words: fiber optics and optical communications, modulation, forward error correction (FEC), coded modulation